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Volume 30 Issue 3
Mar.  2023
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文章导航 >  矿物冶金与材料学报（英文）  > 2023  >  30(3): 581-590
Dan Mao, Zhen Zhang, Mei Yang, Zumin Wang, Ranbo Yu, and Dan Wang, Constructing BaTiO3/TiO2@polypyrrole composites with hollow multishelled structure for enhanced electromagnetic wave absorbing properties, Int. J. Miner. Metall. Mater., 30(2023), No. 3, pp. 581-590. https://doi.org/10.1007/s12613-022-2556-7
Cite this article as:
Dan Mao, Zhen Zhang, Mei Yang, Zumin Wang, Ranbo Yu, and Dan Wang, Constructing BaTiO3/TiO2@polypyrrole composites with hollow multishelled structure for enhanced electromagnetic wave absorbing properties, Int. J. Miner. Metall. Mater., 30(2023), No. 3, pp. 581-590. https://doi.org/10.1007/s12613-022-2556-7
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研究论文

具有中空多壳结构的BaTiO3/TiO2@聚吡咯复合材料的制备及其吸波性能研究

  • 1)

    中国科学院过程工程研究所生化工程国家重点实验室，北京 100190，中国

  • 2)

    北京科技大学冶金与生态工程学院储能科学与工程系，北京 100083，中国

  • 3)

    中国科学院大学, 北京 100049, 中国

  • 通讯作者:

    杨梅    E-mail: myang@ipe.ac.cn

    于然波    E-mail: ranboyu@ustb.edu.cn

    王丹    E-mail: danwang@ipe.ac.cn

文章亮点

  • (1) 开发了具有中空多壳层结构的BaTiO3基复合材料的制备方法。
  • (2) 制备的BaTiO3基中空多壳层结构复合吸波材料具有优异的吸波性能。
  • (3) 研究了中空多壳层结构复合材料提高吸波性能的原因和影响机制。
  • 信息时代的迅速发展带来了不可忽视的电磁污染问题，吸波材料在电磁污染、信息安全等领域发挥着重要作用。理想的吸波材料应当具有涂层薄、吸收强、频带宽、机械性能好等优点。BaTiO3属于传统的介电损耗型吸波材料，拥有较高的介电常数，然而吸收强度低、有效频带窄等缺陷限制了其发展应用。通过材料纳微结构的调整以及成分的复合对BaTiO3进行改性处理，是提高材料吸波性能的有效方法。本文旨在开发一种吸收强度高、有效频带宽的BaTiO3基复合吸波材料。以碳质微球为模板，采用次序模板法合成了中空多壳层结构（HoMS）的TiO2微球，经原位水热将TiO2转变为BaTiO3，再通过吡咯蒸气聚合在BaTiO3/TiO2 HoMS壳层上包覆聚吡咯（PPy），成功制备了具有不同壳层数目的复合吸波材料。利用矢量网络分析仪对不同BaTiO3基复合吸波材料的电磁参数进行测试，分析了不同复合结构对材料吸波性能的影响。研究结果表明，包覆了PPy的BaTiO3基复合材料表现出更加优异的吸波性能。其中，三壳层BaTiO3/TiO2@PPy HoMSs的吸波性能最佳，有效吸收频宽达4.20 GHz，在13.34 GHz处反射损失最小，为−21.8 dB，吸波涂层的最佳匹配厚度仅为1.3 mm。中空多壳层结构不仅能够延长电磁波的传输路径，同时为不同损耗机制材料的复合提供了丰富的调控空间，实现了吸波性能的提高。
    • Research Article

    Constructing BaTiO3/TiO2@polypyrrole composites with hollow multishelled structure for enhanced electromagnetic wave absorbing properties

    + Author Affiliations
      Abstract
    • BaTiO3/TiO2@polypyrrole (PPy) composites with hollow multishelled structure (HoMS) were constructed to enhance the electromagnetic wave absorbing properties of BaTiO3-based absorbing material. BaTiO3/TiO2 HoMSs were prepared by hydrothermal crystallization using TiO2 HoMSs as template. Then, FeCl3 was introduced to initiate the oxidative polymerization of pyrrole monomer, forming BaTiO3/TiO2@PPy HoMSs successfully. The electromagnetic wave absorbing properties of BaTiO3/TiO2 HoMSs and BaTiO3/TiO2@PPy HoMSs with different shell number were investigated using a vector network analyzer. The results indicate that BaTiO3/TiO2@PPy HoMSs exhibit improved microwave absorption compared with BaTiO3/TiO2 HoMSs. In particular, tripled-shelled BaTiO3/TiO2@PPy HoMS has the most excellent absorbing performance. The best reflection loss can reach up to −21.80 dB at 13.34 GHz with a corresponding absorber thickness of only 1.3 mm, and the qualified absorption bandwidth of tripled-shelled BaTiO3/TiO2@PPy HoMS is up to 4.2 GHz. This work paves a new way for the development of high-performance composite microwave absorbing materials.
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